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Diffstat (limited to 'bfd/elf32-m68hc12.c')
| -rw-r--r-- | bfd/elf32-m68hc12.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/bfd/elf32-m68hc12.c b/bfd/elf32-m68hc12.c new file mode 100644 index 0000000..b4db9bc --- /dev/null +++ b/bfd/elf32-m68hc12.c @@ -0,0 +1,281 @@ +/* Motorola 68HC12-specific support for 32-bit ELF + Copyright (C) 1999, 2000 Free Software Foundation, Inc. + Contributed by Stephane Carrez (stcarrez@worldnet.fr) + (Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com)) + +This file is part of BFD, the Binary File Descriptor library. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/m68hc11.h" + +static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup +PARAMS ((bfd * abfd, bfd_reloc_code_real_type code)); +static void m68hc11_info_to_howto_rel +PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); + + +/* Use REL instead of RELA to save space */ +#define USE_REL + +/* The Motorola 68HC11 microcontroler only addresses 64Kb. + We must handle 8 and 16-bit relocations. The 32-bit relocation + is defined but not used except by gas when -gstabs is used (which + is wrong). + The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */ +static reloc_howto_type elf_m68hc11_howto_table[] = { + /* This reloc does nothing. */ + HOWTO (R_M68HC11_NONE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_NONE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 8 bit absolute relocation */ + HOWTO (R_M68HC11_8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_8", /* name */ + false, /* partial_inplace */ + 0x00ff, /* src_mask */ + 0x00ff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 8 bit absolute relocation (upper address) */ + HOWTO (R_M68HC11_HI8, /* type */ + 8, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_HI8", /* name */ + false, /* partial_inplace */ + 0x00ff, /* src_mask */ + 0x00ff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 8 bit absolute relocation (upper address) */ + HOWTO (R_M68HC11_LO8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_LO8", /* name */ + false, /* partial_inplace */ + 0x00ff, /* src_mask */ + 0x00ff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 8 bit PC-rel relocation */ + HOWTO (R_M68HC11_PCREL_8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_PCREL_8", /* name */ + false, /* partial_inplace */ + 0x0, /* src_mask */ + 0x00ff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 16 bit absolute relocation */ + HOWTO (R_M68HC11_16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont /*bitfield */ , /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_16", /* name */ + false, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 32 bit absolute relocation. This one is never used for the + code relocation. It's used by gas for -gstabs generation. */ + HOWTO (R_M68HC11_32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_32", /* name */ + false, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 3 bit absolute relocation */ + HOWTO (R_M68HC11_3B, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 3, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_4B", /* name */ + false, /* partial_inplace */ + 0x003, /* src_mask */ + 0x003, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 16 bit PC-rel relocation */ + HOWTO (R_M68HC11_PCREL_16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M68HC11_PCREL_16", /* name */ + false, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy */ + HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_M68HC11_GNU_VTINHERIT", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage */ + HOWTO (R_M68HC11_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + _bfd_elf_rel_vtable_reloc_fn, /* special_function */ + "R_M68HC11_GNU_VTENTRY", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ +}; + +/* Map BFD reloc types to M68HC11 ELF reloc types. */ + +struct m68hc11_reloc_map +{ + bfd_reloc_code_real_type bfd_reloc_val; + unsigned char elf_reloc_val; +}; + +static const struct m68hc11_reloc_map m68hc11_reloc_map[] = { + {BFD_RELOC_NONE, R_M68HC11_NONE,}, + {BFD_RELOC_8, R_M68HC11_8}, + {BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8}, + {BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8}, + {BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8}, + {BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16}, + {BFD_RELOC_16, R_M68HC11_16}, + {BFD_RELOC_32, R_M68HC11_32}, + {BFD_RELOC_M68HC11_3B, R_M68HC11_3B}, + + /* The following relocs are defined but they probably don't work yet. */ + {BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT}, + {BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY}, +}; + +static reloc_howto_type * +bfd_elf32_bfd_reloc_type_lookup (abfd, code) + bfd *abfd ATTRIBUTE_UNUSED; + bfd_reloc_code_real_type code; +{ + unsigned int i; + + for (i = 0; + i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map); + i++) + { + if (m68hc11_reloc_map[i].bfd_reloc_val == code) + return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val]; + } + + return NULL; +} + +/* Set the howto pointer for an M68HC11 ELF reloc. */ + +static void +m68hc11_info_to_howto_rel (abfd, cache_ptr, dst) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *cache_ptr; + Elf32_Internal_Rel *dst; +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max); + cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; +} + +/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c. + The Motorola spec says to use a different Elf machine code. */ +#define ELF_ARCH bfd_arch_m68hc12 +#define ELF_MACHINE_CODE EM_68HC12 +#define ELF_MAXPAGESIZE 0x1000 + +#define TARGET_BIG_SYM bfd_elf32_m68hc12_vec +#define TARGET_BIG_NAME "elf32-m68hc12" + +#define elf_info_to_howto 0 +#define elf_info_to_howto_rel m68hc11_info_to_howto_rel +#define elf_backend_object_p 0 +#define elf_backend_final_write_processing 0 + +#include "elf32-target.h" |